/*
 * Copyright (c) 2022 KCloud-Platform-Alibaba Author or Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.laokou.gateway.utils;

import io.netty.handler.ipfilter.IpFilterRuleType;
import io.netty.handler.ipfilter.IpSubnetFilterRule;
import jakarta.validation.constraints.NotNull;

import java.util.List;

import static org.laokou.common.i18n.common.Constant.SLASH;

/**
 * @author laokou
 */
public class RuleUtil {

	public static IpSubnetFilterRule source(String source) {
		if (!source.contains(SLASH)) {
			source = source + SLASH + 32;
		}
		String[] ipAddressCidrPrefix = source.split(SLASH, 2);
		String ipAddress = ipAddressCidrPrefix[0];
		int cidrPrefix = Integer.parseInt(ipAddressCidrPrefix[1]);
		return new IpSubnetFilterRule(ipAddress, cidrPrefix, IpFilterRuleType.ACCEPT);
	}

	@NotNull
	public static List<IpSubnetFilterRule> convert(List<String> values) {
		return values.parallelStream().map(RuleUtil::source).toList();
	}

}
